Yoony Byun's prosthetic leg concept repurposes sneaker parts, making a user-adjustable, low-cost limb:

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Byun had in mind the common injuries that happen in landmine encounters—lower leg amputations sustained in parts of the world where landmines can linger, hidden, indefinitely. (78% of landmine injuries in Cambodia, for instance, are this "transtibial" kind.)

 

 

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Byun's model uses both the shoe's sewn upper for its knee brace and the hard rubber treads for its foot—a simple design made to accommodate wet labor conditions without damage.

 

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More at Byun's web site.

via Universal Design Style.